Gaming PC

Going to be getting myself my own computer, and I'm not that great on choosing what is good for a Gaming PC. I have a budget of $1200 and this is only for the computer itself, not including keyboard, mouse and etc. Any suggestions?

Been looking at the parts above, and been looking at a few gaming computers. One I found in particular seems good but I'm not sure.
The price is about $949.78, but I'm not sure if it's good compared to others.

Would take GTX 660 2 GB

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